Separable fastener



y 1930- w. JONES 1,759,560

SEPARABLE FASTENER Filed Feb. 11, 1928 J mm MUM Patented May 20, 1930 I;1,.UNITED seams PATENT. orrlcs f WALTER-I. JoNEsornnn'ms'ron,ranssacimsn'rrs, ,ASSIGHOR, BY MESNE ASSIG N I MENTS, To Ulimo-CARR I'As'rnuna oonroaa'rron, or CAMBRIDGE, MASSACHU- su'r'rs, Aooaronar onjor MASSACHUSETTS 1 SEPAR BLE' rnsrnnna Application filedFebruary 11, 1928; SeriaI No. 253,731;

My invention aims to provide improvements in separablefastenersparticularly of the three-side lock type.

In the drawings which illustrate embodiments of myinvention 1 Figure 1is a vertical section taken through a fastener'installation, the studbeing shown in elevation; v

Fig. 2 is an elevation of the socket installation as viewed from theinner face of the socket support; I

Fig. 3 is a section of the socket taken on the line 3-3 of Fig. 1; I

Fig. lis a vertical section taken througha second form of fasten-erinstallation embodying my invention;

Fig; 5 is a view ofithe socket installation shown in Fig. 1; and I Fig.6 is a section of the socket taken on the line 6-6 of Fig. 4. i

Referring to the drawings, which illustrate snap fastener meansparticularly adapted for use where it is desirable to secure a preferredflexible covering or curtain in place, I have 3 and a relativelypronounced abrupt shoulder 4 between the head and neck, as clearlyindicated in Fig. 1. The stud 1 may be secured to a support in anysuitable manner. However,for the purposes of illustration, I

I have shown the stud secured to the supporting part 5, as by means ofthe screw 6. The head 2 is provided with a slot 2 to facilitate turningthe screw into the support 5.

The socket installation, shown in 1 and 2, includes the flexible medium'7, the stud-receiving casing part8, located at the inner face of themedium 7, and the attaching part 9. located at the outer face'of themedium 7. The attaching part 9 presents a rivet portion 10 passingthrough the medium 7 and clenched against the base portion 11 of thecasing part 8, as shown in Fig. 1.

The casing part 8 has a studreceiving aperture 12 surrounded by aring-like portion 13 divided by a plurality of slits 14 into a number ofresilientstud-engaging fingers 19 whichare ,U-shaped in cross-sectionThe wall of the ring-like portion, which is adjacent to the aperture 12,terminates in an ab:- rupt manner for a portionhof itscirc unference(Figsl and 3), While another por tion terminates in a curvedmanner topro-. I

vide cam means. Thus, some of the fingers 19 termmate in an abruptshouldered portion 20. around the periphery of the stud-receiv- I ingaperture 1 2, while the remaining fingers. terminate ina curved.shoulder portion 21 around the aperture,.as,best illustrated in Fig. 3.I

lVhen' the studa'nd socket are engaged l), the abrupt shoulderedportion20 makesinterlocking contact behind the shoulder 4' of thezstudto prevent separation of the fastener by stresses exerted adjacent theshoulder, or atthree sides ofthe fastener. On the other hand, thecurvedshoulder poition 21 provides cam means cooperating with the shoulder tto permit separation of thefastner by apull at the fourth side of thefastener. r V

} The embodiment of my invention illustrat'ed y Figs. 4through 6 isdirected to fas-' tening means for the same purposes for which the abovedescribed is adapted.- In thisinstance, however, I have shown a socketinstallation of slightly different construction.

The stu d engaging part 22 is divided by it single slit 23 (F igs f and6) and thepart 22 is,,.therefore, contractible and expansihle as a wholefor engagement with the stud 1. The abrupt shoulder 24 and roundedshoulder 25 accomplish the same results as the shoulders '20 and 21,above described, and, therefore,

further explanation oft-he operation of this fastener is unnecessary.

In securing this stud-engaging part 22 to its carrying medium, it isnecessary to provide relatively large prong-receiving openings 26 in thebase fiange'27, so that the prongs 28 presented by the attaching part29will not interfere with the expansion and contraction thereof. v p vWhile I have shown and described two embodimentsof my invention, I donot wish tobe limited thereto, as'the scope of my. invention i will bebest understood by reference to the following claims. l Claims:

1. Athree-side lock fastener comprising, in combination, a stud having al1ead,.a neck and a relatively abrupt shoulder between said head andsaidneck,,a' cooperating socket in- "cluding a stud engagingpart having, astud;

receiving aperture'surrounded' bya yiel'd'able stud-engagingWall, saidWall having a flat v a portion surroundinga portion of: thecircumferenceof the stud-receiving aperture and engaged directly with the shoulderof-t'he stud at three sides to'prevent separation when stress is exertedbetween the stud and socket" adjacent to'thjose three sides and saidwall having a generally curved portion foranothen portion of thecircumference of the stud-re I portion engaged with the fourth' side'of'the shoulder-to permit disengagement of the stud --'tionofsaid'wall, p g

' 2 3A three-side lockrfastener comprising,

ceiving apertureio-provide-a rounded cam and socket'by a1 separatingstress exerted at the'said fourth side ad acent'to said camporcombination, a'stud having a head, aneck' [and a relatively abruptshoulder between said}head andsaidneck, a cooperating socket i includinga stud-engaging part having astudreceiving aperturesurroundedJoyayieldable I stud-'engagingwall, said "wan being divided i I into anumber o-fre'silient fingers substanti'a-l V saidjshoulder.

ly- U-sha-ped in cross-section, some of saidfi'n gers terminatingabruptly .to make locking engagement back of said shoulder onsaid'studerture,said wall being split to provides. plu- I rality of substantiallyu -shaped-resilientfingers surrounding the stud-receiving aperture, someof said-fingers terminating in a manner toprovidean abrupt shou-lderportion and otherofith'e said fingers terminating-in afmanner to.provide .a generally. curved shoulder portion asand for thepurposesdescribed.

" In testimony whereof, Ifliave signedfjlny lg misse 7 andother fingersbeing curved adjacent to a their ends tomak'eseparable engagement with v3.1A three-side lock fastener comprising;

' in combination, astud having'a. head, a neck and a relatively abruptshoulder'betweens'aid head and said neck, a cooperating socketincludinga stud-engaging part having a studreceiving aperture surroundedby a yieldable stud-engaging wall, said Wall "having a portion of itsfree edgeterminatingrelativelyg Y abruptly'and facing the shoulderofjthe stud 1 so that the free edge makes lockin'gengagement-back of theshoulder of said stud and having another {portion terminating inagenerally' curved cam portion to provide for-sep-j aration of thefastener; 5

4t. A'fastener socket casin-gjhaving a stud receiving? aperturesurroundedfby a Wall which is substantially U-shaped in cross-section,said U-shaped 1 Wall being "split to pro? vide a resilientuw allsurrounding the studof its free, edge terminating v in an abruptshoulder portion and another portion of said wall terminating in agenerally curved shoul der portion as and for the purposes described.

5. .A- one-piece fastener so'cket casinghav ing a wall surrounding astud-receiving ap receiving aperture, said Wall having a portion

